A225 Assessment of Bedside Intestinal Ultrasound in Monitoring Crohn’s Disease Activity

Abstract Background Bedside intestinal ultrasound (IUS) is an evolving modality in monitoring disease activity and assessing complications in inflammatory bowel disease (IBD). The easy-tolerability and immediate accessibility to results for expedited clinical decision-making contribute to the growing global attraction of IUS integration into IBD care. Fecal calprotectin (FC) is a known, non-invasive tool to assess disease activity in IBD. However, it comes with limitations. Aims To assess the efficacy of IUS in monitoring Crohn’s Disease (CD) compared to FC level. Methods We conducted a retrospective observational study in patients with confirmed CD at a certified IUS gastroenterologist’s outpatient clinic in Saskatoon. Patients’ charts undergoing IUS between February 2022 and April 2023 were reviewed. Patients with CD and available FC results within a month of IUS performance were identified. Age, gender, disease character, clinical symptoms (Harvey-Bradshaw Index (HBI)), FC levels, and IUS bowel wall thickening (BWT) were collected. The cut-off for FC levels and BWT for disease activity were ampersand:003E250 μg/g and ampersand:003E3 mm, respectively. The correlation between IUS BWT and FC levels was analyzed based on the Pearson correlation. Results Among a total of 178 chart reviews, 71 patients were identified. The median age was 49 years, 52.1% were males and 47.8% were females. 35 (49.3%) ileal CD, 35 (49.3%) ileocolonic and 1 (1.4%) colonic CD were identified. The HBI score verified 67.6% mild disease, 19.7% moderate, 11.2% in remission, and 1.4% severe disease. The Pearson correlation coefficient (r) between FC levels and BWT findings on IUS was r = 0.29 (P ampersand:003C0.0001), indicating a weak positive correlation. Conclusions A positive but weak correlation exists between bowel wall thickening in IUS and FC level in monitoring CD. Recognizing FC limitations, future multi-center, larger cohort studies need to be done to investigate this correlation further. Funding Agencies None